SLVSD04 April   2015 TPS22860

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1. 3.1 Common Application Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 ON/OFF Control
      2. 7.3.2 Pass Transistor
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Inrush Current
        2. 8.2.2.2 ON/OFF Interface
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Thermal Reliability
    3. 10.3 Improving Package Thermal Performance
    4. 10.4 Layout Example
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

8.1 Application Information

This section will highlight some of the design considerations when implementing this device in a common application.

8.2 Typical Application

The TPS22860 IC is a high side load switch. The TPS22860 internal components are rated for 1.65-V to 5.5-V supply and support up to 200 mA of load current. The TPS22860 can be used in a variety of applications. Figure 8 below shows a general application of TPS22860 to control the load inrush current.

TPS22860 tps22860_key_graphic.gifFigure 8. Standard Load Switching Application

8.2.1 Design Requirements

Table 2. Component Table

COMPONENT DESCRIPTION
CIN Input capacitance(1)
LOAD Load resistance and capacitance will affect the output rise time
(1) Required for load inrush current (slew rate) control

8.2.2 Detailed Design Procedure

8.2.2.1 Inrush Current

To limit the voltage drop on the input supply caused by transient inrush currents when the switch turns on into a discharged load capacitor, a capacitor must be placed between VIN and GND. A 1-µF ceramic capacitor, CIN, placed close to the pins, is usually sufficient. Higher values of CIN can be used to further reduce the voltage drop during high-current applications. When switching heavy loads, TI recommends to have an input capacitor about 10× higher than the output capacitor to avoid excessive voltage drop. Do not float the ON pin.

8.2.2.2 ON/OFF Interface

The load switch is controlled by the voltage at the ON pin. To turn ON, the input voltage must be larger than VIH and to turn off the voltage must be below VIL.

In applications where an ON/OFF signal is not available, connect ON pin to VIN. The TPS22860 will turn ON/OFF in sync with the input supply connected to VIN.

NOTE

Connect a pull down resistor from the ON pin to GND when the ON/OFF signal is driven by a high-impedance (tri-state) driver.

8.2.3 Application Curves

TPS22860 tps22860_f7.gifFigure 9. tON and tOFF vs VBIAS
TPS22860 tps22860_f8.gifFigure 10. tON and tOFF vs Temperature (VBIAS = 5 V)